Prayer for Vocations

The Curé d'Ars Prayer Group has a page with a Vocations Prayer through the intercession of St. John Vianney:

A Prayer for Vocations
Through the intercession of St. John Vianney

O God our Father, You promised "I will appoint shepherds for My sheep who will shepherd them so that they need no longer fear and tremble: and none shall be missing." (Jer. 23:4-5). Hear the prayers of Your flock. Through the intercession of Your beloved priest, Saint John Vianney, we beg You to call to the sacramental priesthood generous men who will desire nothing more than to serve You in imitation of Your Son, Our Lord Jesus Christ, our High Priest.

And after You call them, we pray that You sustain the doubtful, console the discouraged, and strengthen the weak as they start the long and demanding preparation for the priesthood.

Mary, Mother of priests, and example of faithful, humble, and joyful acceptance of God's will, help all those who are called to the priesthood to open their ears and hearts to the gentle call of the Holy Spirit.